/* Estilo dos guias do Rende3D (identidade Índigo) — claro e escuro automático */
:root {
  --bg: #ffffff;
  --texto: #17162a;
  --suave: #686884;
  --borda: #d6d6e6;
  --destaque: #5540c9;
  --caixa: #f5f5fa;
  --header: rgba(255, 255, 255, 0.88);
  --btn-a: #6753e3;
  --btn-b: #06b6d4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0b18;
    --texto: #eaeaf4;
    --suave: #8888a8;
    --borda: #262539;
    --destaque: #a29bf6;
    --caixa: #17162a;
    --header: rgba(12, 11, 24, 0.88);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--texto);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.75;
}
a { color: var(--destaque); }

header { position: sticky; top: 0; z-index: 10; background: var(--header); backdrop-filter: blur(8px); border-bottom: 1px solid var(--borda); }
.barra { max-width: 820px; margin: 0 auto; padding: 12px 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.marca { text-decoration: none; color: var(--texto); display: inline-flex; flex-direction: column; gap: 3px; }
.marca strong { font-family: Sora, Inter, sans-serif; font-weight: 800; font-size: 20px; letter-spacing: -0.02em; line-height: 1; }
.faixa { display: flex; gap: 3px; }
.faixa i { display: block; height: 4px; width: 14px; border-radius: 2px; }
.abrir { font-size: 13px; font-weight: 600; text-decoration: none; padding: 8px 14px; border-radius: 10px; color: #fff; background: linear-gradient(90deg, var(--btn-a), var(--btn-b)); white-space: nowrap; }

main { max-width: 820px; margin: 0 auto; padding: 26px 20px 56px; }
.trilha { font-size: 13px; color: var(--suave); margin-bottom: 14px; }
.trilha a { color: var(--suave); text-decoration: none; }
.trilha a:hover { text-decoration: underline; }
h1 { font-family: Sora, Inter, sans-serif; font-size: 34px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
.meta { color: var(--suave); font-size: 13px; margin: 0 0 20px; }
.lead { font-size: 18px; color: var(--texto); margin: 0 0 8px; }
h2 { font-family: Sora, Inter, sans-serif; font-size: 22px; line-height: 1.25; margin: 40px 0 10px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 6px; }
p, li { font-size: 16px; }
p { margin: 10px 0; }
ul, ol { padding-left: 22px; margin: 10px 0; }
li { margin: 6px 0; }

.resumo { background: var(--caixa); border: 1px solid var(--borda); border-left: 4px solid var(--destaque); border-radius: 12px; padding: 14px 18px; margin: 18px 0; }
.resumo p { margin: 4px 0; }
.formula { font-family: Sora, Inter, sans-serif; font-weight: 700; font-size: 17px; }

.tabela { overflow-x: auto; margin: 14px 0; border: 1px solid var(--borda); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 460px; }
th, td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--borda); }
td.n, th.n { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: 0; }
th { background: var(--caixa); font-weight: 600; }
tr.total td { font-weight: 700; background: var(--caixa); }

.cta { margin: 36px 0; padding: 22px; border-radius: 16px; background: linear-gradient(135deg, #17162a, #312669); color: #eaeaf4; }
.cta h2 { margin: 0 0 6px; padding: 0; border: 0; color: #fff; font-size: 20px; }
.cta p { color: #c7c3fb; margin: 6px 0 14px; }
.cta a.botao { display: inline-block; text-decoration: none; font-weight: 700; color: #fff; padding: 11px 20px; border-radius: 12px; background: linear-gradient(90deg, #6753e3, #06b6d4); }

details { border: 1px solid var(--borda); border-radius: 12px; padding: 4px 16px; margin: 10px 0; background: var(--caixa); }
summary { cursor: pointer; font-weight: 600; padding: 10px 0; }
details p { margin: 0 0 12px; }

.relacionados { display: grid; gap: 10px; margin: 12px 0; }
.relacionados a { display: block; text-decoration: none; border: 1px solid var(--borda); border-radius: 12px; padding: 12px 16px; color: var(--texto); }
.relacionados a:hover { border-color: var(--destaque); }
.relacionados small { display: block; color: var(--suave); font-size: 13px; margin-top: 2px; }

.aviso { font-size: 14px; color: var(--suave); border-top: 1px solid var(--borda); margin-top: 32px; padding-top: 14px; }

footer { border-top: 1px solid var(--borda); background: var(--caixa); }
.rodape { max-width: 820px; margin: 0 auto; padding: 24px 20px; display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; font-size: 13px; color: var(--suave); }
.rodape nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.rodape a { color: var(--suave); text-decoration: none; font-weight: 500; }
.rodape a:hover { color: var(--destaque); text-decoration: underline; }

@media (max-width: 560px) {
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
  .lead { font-size: 17px; }
}